07/18/0806/17/08Group Meeting Chun-Min Jen 1 CLEO-c D + s e e Prof. Sheldon Stone, Dr....
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Transcript of 07/18/0806/17/08Group Meeting Chun-Min Jen 1 CLEO-c D + s e e Prof. Sheldon Stone, Dr....
07/18/0806/17/08 Group Meeting Chun-Min Jen
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CLEO-cCLEO-cDD++
s s eeee
Prof. Sheldon Stone, Dr. Liming ZhangSpeaker : Chun-Min (Mindy) Jen
Syracuse Universityon behalf of CLEO collaboration
07/18/0806/17/08 Group Meeting Chun-Min Jen
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Apply different selection criteria on the determination of +/+ fake to e+ rate from what we did for D+
s ee.
we require every charged track, composed of e± or ± or ±, should pass “GoodTrack”, “KaonOK” and “PionOK”.
we didn’t require the final state be *only* one charged track; instead, we allow more than one charged track appeared as our final states.
Only those signal charged tracks within the signal and sideband regions of single-tags are dumped into n-tuples as raw data.
We didn’t exclude those charged tracks with the same charge-sign as that of the mother of single-tags, DS
Signal single track's momentum > 0.2 GeV
|COS θe| < 0.8 for signal single charged track
We store lots of info. Into our n-tuples.
e+ e-
D-/+S
Ec.o.m.=MeV
D*±S
D±S
+
e+
e
D+S
D-S
D-S
D+S
±± from same/opposite-sign
DS may fake into e+
I : Inclusive D+S X e+ e
Our New Plan
e-
Sometimes, don’t believe your eyes.
07/18/0806/17/08 Group Meeting Chun-Min Jen
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DS signal
Mass region
DS sideband
Mass region
± / ± fake into e±
For one-prong
K± / ± fake into e±
For one-prong
K± / ± fake into e±
For multiple-prong
K± / ± fake into e±
For multiple-prong
K± /± fake into e±
For one-prongSideband-subtracted
K± / ± fake into e±
For multiple-prongSideband-subtracted
07/18/0806/17/08 Group Meeting Chun-Min Jen
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MomentumMomentum Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/o bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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MomentumMomentum Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/ bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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Extra EnergyExtra Energy Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/o bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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Extra EnergyExtra Energy Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/ bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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MomentumMomentum Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/o bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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MomentumMomentum Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/ bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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Extra EnergyExtra Energy Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/o bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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Extra EnergyExtra Energy Distribution in Data
EID & Kaon-ID & Pion-ID for oppositeopposite - sign of Ds
± fake into e± w/ bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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MomentumMomentum Distribution in Data
EID & Kaon-ID & Pion-ID for samesame - sign of Ds
e± w/ bin-by-bin weighting momentum distributions by fake rates
07/18/0806/17/08 Group Meeting Chun-Min Jen
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Extra EnergyExtra Energy Distribution in Data
EID & Kaon-ID & Pion-ID for samesame - sign of Ds
e± w/ bin-by-bin weighting momentum distributions by fake rates
Table I. Refer to Chul-Su Park’s CBX
One-Prong # of fake events(after sideband-subtracted)
Before multiplying fake-rate ± e±
3558 ; [Eextra < 0.4 GeV] = 1103
After multiplying fake-rate ± e±
14 ; [Eextra < 0.4 GeV] = 5
Before multiplying fake-rate ± e±
14230 ; [Eextra < 0.4 GeV] = 1913
After multiplying fake-rate ± e±
4 ; [Eextra < 0.4 GeV] = 1
Table II. Refer to Chul-Su Park’s CBX
Multiple-Prong # of fake events(after sideband-subtracted)
Before multiplying fake-rate ± e±
11945 ; [Eextra < 0.4 GeV] = 6123
After multiplying fake-rate ± e±
33 ; [Eextra < 0.4 GeV] = 19
Before multiplying fake-rate ± e±
69142 ; [Eextra < 0.4 GeV] = 23129
After multiplying fake-rate ± e±
19 ; [Eextra < 0.4 GeV] = 7
07/18/0806/17/08 Group Meeting Chun-Min Jen
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Future Plan …
Get the branching fraction measurement for inclusive D+
S X e+ e
Get the preliminary branching fraction
measurement for D+S +